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Can HPV Vaccine Stop Throat Cancer?

Explosive Rise in HPV Throat Cancer; Panel Mulls Vaccinating Boys
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WebMD Health News
Reviewed by Louise Chang, MD

June 23, 2011 -- Can HPV vaccines stop the explosive rise of HPV-related head and neck cancer?

HPV (human papillomavirus) vaccines protect against the sexually transmitted strains of HPV that cause cervical cancer. The same HPV strains -- spread by kissing and by oral sex -- cause oropharyngeal (OP) cancer, the form of head and neck cancer that affects the back and sides of the throat, the base of the tongue, and the tonsils.

There's strong evidence that HPV vaccines prevent cervical cancer. There's no direct proof that these vaccines prevent throat cancer, but the rapid rise in cases among young people has some experts wanting to vaccinate first and get proof later.

"We don't need to wait until all these molecular events are understood," Dong Moon Shin, MD, of Emory University's Winship Cancer Center, tells WebMD. "The time is now. For the HPV vaccine, cost is the only issue as side effects are minimal. Routine HPV vaccination has to be implemented very soon, for both boys and girls."

In the U.S., that recommendation is made by the Advisory Committee on Immunization Practices (ACIP). The ACIP now recommends routine HPV vaccination only for girls and young women in order to prevent cervical cancer. It permits vaccination of boys who want protection against HPV-caused genital warts.

For two years, the ACIP has been mulling whether to recommend the HPV vaccine for boys. This would help prevent cervical cancer in unvaccinated women. It also would prevent HPV-related anal cancer and genital warts in both men and women, as well as HPV-related cancer of the penis.

But HPV causes anal cancer and penile cancer far less often than it causes cervical cancer, and if enough girls were to get the HPV vaccine -- about 50% -- it wouldn't be cost-effective to vaccinate boys.

Throat cancer is rapidly changing this scenario.

Throat Cancer Tipping Scales Toward HPV Vaccination of Boys

At yesterday's meeting, the ACIP heard a disturbing report from Aimee Kreimer, PhD, an expert in head and neck cancer at the National Cancer Institute.

"At some point ... it is projected that there will be the same incidence of OP cancer in men as cervical cancer in women," Kreimer said. "If current trends continue, OP cancer in men will pass cervical cancer in 2025."

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